Rockhopper handed The Masked Singer fans a huge clue on tonight's show - and now they're sure it's a huge popstar behind the mask.
The secret celeb appeared on the ITV show tonight for another show stopping performance, but following their clue package, fans are now sure that it is an international popstar under the penguin mask.
They impressed the five judges - Rita Ora, Davina McCall, Jonathan Ross, Mo Gilligan and guest judge Olly Alexander from Years & Years - with their incredible performance on the show.
But one of the clues, which referenced an electricity fail, has set tongues wagging on social media over the identity.
One Twitter user wrote: "Michelle williams, going off the roman numerals on the back of the jacket and the fact the superbowl was known as the blackout bowl.....either michelle or Alicia Keys #maskedsingeruk."
At the Superbowl that year, there was famously a 34-minute power outage in the middle of the game, giving it the nickname 'the blackout bowl'.
"The electricity clue , Anyone remember when Michelle Williams was electrocuted last time she did Masked Singer in the US. Definitely her," a second person penned on social media.
A third shared: "Researched the electricity reference here-there was a power cut at the 2013 superbowl .... which Destiny's child performed at .... its Michelle Williams. #MaskedSingerUK."
Rockhopper describes themselves as an entertainer, and has thrilled the judges and viewers at home with their rendition of Amy Winehouse's Love Is A Losing Game whilst they also wowed with a performance of Edge of Midnight.
However, their identity has got everyone guessing - unable to quite work out exactly who might be behind the mask. It's clear the show means a lot to the celeb as they dropped to their knees in disappointment during the first week when they found themselves in the bottom three after singing Higher Love.
In their latest clue package, they referenced being a "jailbird" and said their "career had seen them behind bars", prompting fans to be convinced they must be some sort of actor, who appeared as a character in a show who was sent to jail.
"I'll confess I’ve been another kind of feathered friend in the past, a jailbird," they said, "And while my career might have seen me behind bars, it’s funny because I started as the polar opposite. And I thank those with halos for all I’ve accomplished."
Michelle Williams is one name that's been suggested, whilst Sheridan Smith and Duffy are also bookies' favourites to be unmasked as the celeb behind the penguin get up. Dancing On Ice judge Oti Mabuse also currently has odds at 7/1.
